Improvement in machine for dressing stone



IYIIIIIAHHi!IIIIIIIIIIIIIEEIIIIHNMMIII IIIIN:

N. PETERS, FHOTO-LITNOGRAFMER, WASHINGTON. D C,

' dinde-r1 Stairs @anni @wie 'ALEXANDER e. ANDERSON, or QUINoY, ILLINOIS, AssIeNoR'To HIMsE-LF AND A. W. ANDERSON. p Y

Leners Parent No. 105,159, dated .my 12, 1870.

To all whom it may concern Be it known that I, ALEXANDER G. ANDERSON, of Quincy, in the county of Adams and State of' Illinois, have invented a new and useful Improvementin Machine for Dressing Stone and I do hereby declare that the following is a full, olear,.and exact description thereot', which will enable others skilled in the art to make and use the same, reference being had to the accompalnying drawing forming part of' this speeilication, iu w iichv Figure l is a horizontal section of my improved niachine, taken through theline a; x, iig. 2.

Figure 2is end view ofthe same.

My invention has for its object to furnish animproved machine for dressing marble and other stone, which shall lbe simple in construction and elieetive in operation, doing its work uniformly and well; and

It consists in the construction and, combination of the various parts of the machine, as hereinafter more fully described.

A. is the foundation-flame of the' machine, upon v which are formed or to which are secured the ways a', upon which the bed B is moved back and forth to feed the stone to the cutters.

Thel bed B may be moved4 and adjusted by any ofy the ordinary means for such purposes, and should have a number of holes formed in it, to receive the clamps by which the stone to be dressed is secured in place.

To the middle parts of the sides of the foundationframe A is secured the lower ends of the two side frames C, the upper ends of the four uprights of each of which are connected to each other, and secured iu their proper relative positions by the top frame D.

E are blocks, placed in the space between the four uprights of the two side frames C, and which move up and down upon said uprights.

F are the boxes in which the journals of the cutterlshafts revolve, and which are secured to the opposite sides of the blocks E by bolts, so that, by tightening up the nuts of the said bolts, the block E and boxes F, when adjusted to the proper position, may be securely clamped to the frame G.

G is a pulley, around which 'passes the driving-belt,

and with which'is securely and rigidly connected aA small gear-wheel, H.

The pulley G and gearwheel H work loosely upon the projecting Ijournal ot' one of the cutter-shafts.

The teeth of thesmall gear-whee'I/H mesh into the teeth of the large 'gear-wheel I, attached to the short shaft J, which revolves in bearings in the frame K,

attached to one of the blocks E, and to which is also Iigidly attaohed'the small gear-wheel L, the teeth of which mesh into the teeth of the large gear-wheel M, rigidly attached to the journal of one of the cuttershafts.

By this arrangement of gearing, the rapidity of motion will be lessened, andthe poweriucreased in the same proportion, causing the cutter-shafts to revolve at a slow' rate of speed, and with great power. v

N is the forward, and O is the rear cutter-shaft, to which are respectively attached the cutters P and Q. The cutters l), which first operate upon the stone, are made pointed, and similar to the tool used by the workman for rough work, when dressing the stone by hand.

Q are the rear cutters, the cutting-edges of which are made broad and flat, and which are so arranged that the path or cut of each following cutter may overlap that ofthe preceding one.

The shanks of the cutters P Q enter the shafts N O, and are secured in place by set-screws R, as shown in iigs. 1 and 2.

The cutters P Q are made of chilled iron, or rmay have diamond carbon faces, and are arranged in spiral rows upon the shafts N O, so that, in cut-s not morev 'than four inches deep,v not more than .four cutters will be cutting at the same time.

' S are long screws, passing through and swiveled to the top plate or frame D, and which pass through the centers of the blocks E, through screw-holes formed in or through nuts 'secured to said blocks E, so that, by turning the said screws in one or the other direc tion, the blocks E, and with them the cutter-shafts N O, may be raised or glowered, to adjust them at any desired distance above the bed-plate B. i

Upon the upper-endsv of the swiveled screws S are formed, or to them are attached cranks T, by which fthe said screws may be operated, and which cranks may be connected by a connecting-bar, U, so that the cutter-shafts `may be kept exactly horizontal while being raised and lowered.

Having thus described my invention,

I claim as new and desire to secure by Letters Patent- The reciprocating carriage B, combined with two revolving cutter-stocks, N O, of which the rst haspointed tools P,'aind\the last broad fiat tools Q, ar-

ranged to act successively upon the stone, in the mane ner and for the purpose described. Y

` ALEX. G. ANDERSON.

Witnesses: v l

J .'M'. Oreos, TJJ. MITCHELL. 

